Hmm... remote choppers...
A friend of mine, which owns *several* helicopter models (that's over 10 complete and airworthy, plus enough stuff to build 5 others), claims that one of them can carry up to 100lbs (that's close to 50kg to the rest of mankind) of payload, and he used that to carry a full-size video camera, for some agricultural purposes and terrain recon. So I asked him, what kept him from fitting a paint ball gun, or a real one to the model chopper, and he said "nothing really, don´t you have an spare rifle lying around, do you?" in a very humorous manner...
On the other hand, some 8 year-olds wouldn´t mind strap themselves to a chopper model and fly around, much to their mom's dismay.... I know I would!
Then again, the manhack from Half-Life 2 came to my mind too...